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42669720 = 2333539509
BaseRepresentation
bin1010001011000…
…1011010011000
32222021211212000
42202301122120
541410412340
64122321000
71025454342
oct242613230
988254760
1042669720
11220a4435
1212359160
138abca72
14594a292
153b2cd30
hex28b1698

42669720 has 64 divisors (see below), whose sum is σ = 142236000. Its totient is φ = 11378304.

The previous prime is 42669691. The next prime is 42669721. The reversal of 42669720 is 2796624.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42669721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18675 + ... + 20834.

Almost surely, 242669720 is an apocalyptic number.

42669720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42669720 is an abundant number, since it is smaller than the sum of its proper divisors (99566280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42669720 is a wasteful number, since it uses less digits than its factorization.

42669720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39529 (or 39519 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 42669720 is about 6532.2063653868. The cubic root of 42669720 is about 349.4405211093.

The spelling of 42669720 in words is "forty-two million, six hundred sixty-nine thousand, seven hundred twenty".